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157c3f8097
Details: Currently doing 4 system calls per WM_INPUT message, which can cause the thread handling the message loop to be swapped out several times: * GetProp - to get window data from the window handle * GetRawInputData - to retrieve the raw input data * 2 calls to GetMessageExtraInfo - to ignore synthetic mouse events generated for touchscreens In this change: * Replaced GetProp by iterating the list of windows maintained by SDL (with a fallback to GetProp). Note that this will affect all messages and not just WM_INPUT * only calling GetMessageExtraInfo if a touchscreen has been detected Fix for https://jira.valve.org/browse/CSGO-4855 @saml